Semi-circle tank



FIG. 1 is a perspective view showing my new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a back plan view thereof.

FIG. 4 is a left plan view thereof;

FIG. 5 is a right plan view thereof; and,

FIG. 6 is a downward plan view thereof.

Portion of the semi-circle tank shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for an semi-circle tank, as shown and described. 